Nail expansion



Dec.4,1928. 1,694,266 J. KARITZKY I v NAIL EXPANS ION Original FiledAug. 20, 1926 2 sheetspsheet 1 NVENTOR. NW

A TTORNEYS.

Dec. 4, 1928.

J. KARITZKY AIL EXFANS ION Original Filed Aug. 20, 1926 2 Sheets-Sheet 2l l v I ENTOR. W

BY I ATTORNEYS.

Patented Dec. 1923.

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Sell at resist rice.

J 0H1? KAEETZKY, OF GAR'WOGD, NEW 8 ERSEY, ASSIGNOR BY MESNE ASSEGNMENTS, TO HEZQEY B. NEWE-IALL CORPQRATIGN, 0F GAREVOOD, NEW JERSEY, ACORPORATION OF NEW JERSEY.

Sriglnal application filed August 20, 1323, Serial No. 130,387. DividedFebruary 10, 1927.

This application is a division of my co; pending application Ser. No.130,387, filed August 20, 1926.

My invention relates to expansion bolts and more particularly to a nailexpansion shield formed of wire, or similar material, the wire beingeither round, flat or any other I form, and an insert of any suitablematerial.

My invention relates to such a wire shield having a metal insert whichserves to reduce the area of the axial bore, and to fill up, more orless, the intervals or spaces between the strands of the wire shield, tomore readily guide the expanding member, and increase the bond or gripof the shield with a support. I

My invention further relates to a plurality of wire units held togetherby the insert.

My invention further relates to certain articles of manufacture andcombinations which will be more fully hereinafter described and pointedout in the claims.

In the accompanying drawings the same reference numerals refer tosimilar parts in the several figures.

Fig. 1 is a perspective View of a wire unit, a plurality of which areused to make a wire shield;

Fig. 2 is a si le elevation of one form of wire shield formed by two ofthe units shown in Fig. 1, the units being held together by the insert;

Fig. 3 is a horizontal section on line 33 of Fig. 2;

Fig. 4 is a. vertical section through a support showing a nail beinginserted into the shield;

F 5 is a vertical section on the line 5-5 of Fig. l looking in thedirection of the arrows Fig. 6 is a horizontal section on the line 6-6of Fig.

Fig. 7 is a vertical section, similar to Fig. 4. showing the nail drivenhome in the shield;

Fig. 8 is a vertical section on the line 88 of Fig. 7.

In my invention a cheap grade of commercial soft ire l, of any suitablecontour, is cut to the particular length desired to form the integralwire units 2, having the longitudinally extending strands 3 and 4. Aportion of the wire is bent an angle to the strands to form the headportion 5, the ends nan. nxransroiv.

and this application filed Serial No.'167,081.

of the strands 3 and lare bent at substantially right angles to form thefeet 6, 6 which not only are adapt-ed to bite into the wall or othersupport in which the units are mounted but also assist in holding themetal insert on the units.

My wire shield 7 is formed of a plurality of wire units 2 1), two suchunits being preferably employed, which are held to gether by the metalinsert 8. This insert not only serves as a guide for the nail 9, butreduces the area of the axial bore 10, so as to increase the expansionof the wire shield 7 at the end of the shield. The metal insert may holdthe units together in various ways. have shown one Way in which themetal insert is formed out of a strip of sheet metal, or other suitablematerial, and wrapped around the strands 3 and 4 of the units 2, asshown very clearly in Fig. 3. It will be clear from this figure that themetal insert 8 serves to close the gapsbetween the strands of the wireshield 7 and also forms a guide for the nail 9 so that the nail cannotbe driven at an angle to the longitudinal axis of the shield.

In use the shield is mounted in a hole 110 in a wall 11 and supports anysuitable work, such as a bracket 12. As the nail 9 is driven into theshield, the different units 2, 2 will be forced apart, which action willbe resisted by the metal insert 8, which will become distorted (Fig. 8)or possibly broken as the nail is driven home. It will also be notedthat the maximum expansion occurs at the inner end of the wire shieldremoved from the face 1230f wall 11 so that the face of the Wall willnot be cracked or broken by the expansion of the shield.

While I have shown a smooth nail, it is to be understood that the nailmay be provided with a roughened surface, and that a threaded boltprovided with square or counter sunk head may be employed instead of anail. It will be noted that'my wire expansion shield may be made atminimum cost, that it is simple and will give the maximum efiiciency fora given size shield. It is further to be noted that the diiferent wireunits are each open constructions, which will freely allow galvanizingby the hot process. The inserts are preferably assembled with the unitsafter the wire units have been galvanized though they maybe assembledprior to galvanizing in which case theunits and inserts will begalvanized together.

Having thus described this invention in connection with illustrativeembodiments thereof, to the details of which I do not desire to'belimited, what is claimed as new and What is desired to secure byLettersPatent is set forth in the appended claims.

What I claim is 1. A new article of manufacture compris ing an expansionshield formed of a plurality of'wire units and an insert securing theunits together, the units being provided with one or more feet adaptedto grip the walls of a hole. 0 w h i 2. A new article of manufacturecomprising a Wire shield formed of a plurality of wire units, each unitbeing provided with head member and with one or more feet, and an insertsecuring the units together.

JOHN KARITZKY.

